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In the Forum: Audio For Dummies ™
In the Thread: It is possible to eliminate some forms of gross side band distortions
Post Subject: Re: EnABL Pattern and Ribbed ConesPosted by Bud on: 7/14/2005
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They might. If they are radial rings, straight out from center to outer edge then no effect. If they are a spiral then maybe a small effect that will cause you to coat the cone in the Microscale product with 3 or 4 coats. For circumferential rings, the ones claimed to "break up standing waves", I guess by making their locations permanent, the same coating spree will be needed.
I tend to coat most hard surface paper cones with two coats, three at the maximum due to increasing mass, slight though that is. Heavy felted paper cones need 3 to 5 coats. Aluminum cones just need a band over the rows of blocks and horrible plastic cones , depending upon how much damping material has been "injected" onto the surface might need 3 to 5 coats before the pattern is applied and 3 to 4 more after. You will have to sand these with 800 to 1000 grit garnet wet sand paper first to create enough tooth for the materials to adhere to. The idea of this stuff is to create a controlled boundary layer of fairly uniform character and get the longitudinal pressure wave a little above the speed of sound through air. Doing this just encourages phase coherent waves to be formed in the air and allows maximum energy transfer at the leading edge of the pressure wave as it slams across the surface in the boundary layer.
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